Quantitative ultrasonic testing for near-surface defects of large ring forgings using feature extraction and GA-SVM

• Published in: Applied acoustics Vol. 173; p. 107714
• Main Authors: Guan, Shanyue, Wang, Xiaokai, Hua, Lin, Li, Li
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2021
• Subjects: Feature extraction; GA-SVM; Near-surface blind; Ultrasonic testing; Feature extraction; Ultrasonic testing; Near-surface blind; GA-SVM

•The size (0-1.5mm) and depth (0-2mm) of near-surface defects were divided into four equal sections to lock in a smaller range for quantitative testing.•The pulse width and amplitude of the interface echo were selected as the time-domain features, the main frequency and resonance frequency features...